Question

In the scaled down drawing of a sport utility vehicle shown below, 1/4 of an inch represents 1/2 of a foot. What is the unit rate in inches per foot?

A. 1/2 of an inch per foot of an inch per foot

B. 1/8 of an inch per foot

C. 2 inches per foot

D. 1/4 of an inch per foot​

Answer 1

• A. 1/2 of an inch per foot of an inch per foot

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Set corresponding values:

• 1/4 in ⇒ 1/2 ft
• x in ⇒ 1 ft

If we multiply the first line by 2 we will get the required unit rate of x in/ft:

• 1/4*2 in ⇒ 1/2*2 ft
• 1/2 in ⇒ 1 ft or
• 1/2 in/ft

This matching choice is A.